<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			#list{
				display: flex;
				flex-direction: column;
			}
			#list div{
				width: 100%;
				height: 100px;
				transition: height 2s; 
			}
			#list div:nth-child(1) {background-color: #0000FF;}
			#list div:nth-child(2) {background-color: #bdff70;}
			#list div:nth-child(3) {background-color: #ffbd9e;}
			#list div:nth-child(4) {background-color: #ff134a;}
			#list div:nth-child(5) {background-color: #20ffed;}
		</style>
	</head>
	<body>
		<div id="list">
			<div></div>
			<div></div>
			<div></div>
			<div></div>
			<div></div>
		</div>
		<script type="text/javascript">
			
		</script>
	</body>
</html>
